Wow, heavy stuff for a Sunday, Remind.
First off, Identity politics is a Western thing, and yes, in the "Western world", white people are a majority. If you identify them as "white", that is - I've only ever been called 'white' by other people, never myself, so I consider it an imposed label. It doesn't take a rocket scientist to accept that nobody thinks white people are the world-wide majority!
You have absolutely no idea what you are talking about - 'white men' may have made the rules (of Western liberal democracy at least), but they are not 'white' rules, they are for everyone, and everybody plays them with a huge amount of success - but 'whites-only' ideology is very small and insignificant and is hardly a political force. Marches like these are best ignored, they are not the viewpoint of the majority and if they speak SOME truth to Some people, it's only because of the loony policies of leftists.
Your North-American centric worldview is working against you here. In Europe, where most "white people" live, they think of themselves as Irish, Welsh, whatever - not "white", that's a New World thing - and white males are highly competitive with one another and do not think of themselves/ourselves as an identity group.
Once you think in terms of interest-groups, don't be surprised if a minority of those you vilify so much start to think in those terms too (what you think of as White Supremacists).
"We" don't think of ourselves as a group.
Your comment reveal that you have no understand of history or culture - "white men" created the differences between humans??? Who is the White Supremacist now? What you are saying is that only white people are historical actors - the rest are just window dressing, incapable of thinking for themselves and developing their own prejudices. While we 'whiteys' were busy living in caves, colonialism, slavery and oppression already existed in the world!
And, incidentally, nobody wants to shift the blame from the wrongs of the past, we are more interested in righting them. and creating group-blame and re-writing history, and allowing our own personal hatreds and neuroses to dictate our interpretation of history will not have the desired effect.